Suggestions by @papa'slittlemonster

Lady Gaga

as Synergy in Jem

Ali Larter

as She-Ra in He-Man and the Masters of the Universe

Johnny Depp

as The Phantom of the Opera in Dark Universe

Amanda Seyfried

as Bride of Frankenstein in Dark Universe

Billy Dee Williams

as Lando Calrissian in Fett: A Star Wars Story

John Cena

as Steelwill in SilverHawks

Lady Gaga

as Melodia in SilverHawks

Brenton Thwaites

as Tim Drake in Red Robin

Max Irons

as Jason Todd in Red Robin

Jack O'Connell

as Dick Grayson in Red Robin

Jude Law

as Edward Nygma in Red Robin

Olivia Munn

as Jessica Drew in Spider-Woman (MCU)

Common

as Jon Stewart in Green Lantern Corps

Emma Watson

as Batgirl in Birds of Prey

AnnaLynne McCord

as Black Canary in Birds of Prey

Nikki Reed

as Huntress in Birds of Prey

Ethan Hawke

as Simon Williams in Wonder Man

Matt Barr

as Shaggy Rogers in The Mystery Inc.

Kate Mara

as Daphne Blake in The Mystery Inc.

Shannon Purser

as Velma Dinkley in Scooby-Doo!